I am new to vue.js and I want to call a method in the data so something like this:

data() {
        return {
            title: capitalizeFirstLetter('title'),
        };
    },

and my vue mixin which I imported to my main.js

Vue.mixin({
  methods: {
    capitalizeFirstLetter(str) {
        return str.charAt(0).toUpperCase()   str.slice(1);
    }    
  }
})

but this doesnt work, I cant call capitalizeFirstLetter in the data. Is it possible to call a method in data?

CodePudding user response：

You need to use this

title: this.capitalizeFirstLetter('title'),

CodePudding user response：

Please ensure that you have registered the mixin in the component using mixin property in component.

After that you can access capitalizeFirstLetter method defined inside the mixin using this.capitalizeFirstLetter

Working fiddle

const myMixin = {
  methods: {
    capitalizeFirstLetter(str) {
      return str.charAt(0).toUpperCase()   str.slice(1);
    }
  }
}

new Vue({
  el: "#app",
  mixins: [myMixin],
  data() {
    return {
      title: this.capitalizeFirstLetter('title'),
    };
  },
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  {{ title }}
</div>

<iframe name="sif1" sandbox="allow-forms allow-modals allow-scripts" frameborder="0"></iframe>